16 Nov
2012
16 Nov
'12
9:50 a.m.
On Nov 16, 2012, at 12:29 PM, ben wrote:
On 11/16/2012 1:26 AM, Eric Smith wrote:
2N2222s should work, but they're heavy hitters. Seems like
overkill. Also, I haven't read the article in question
yet (need to dig through the thread to find the link), but
if Eric was talking about 2N3906s, those are PNP (the 2N2222
is NPN). You'd probably need to modify the schematic, if
only a little bit.
2N3906 and 2N4402 are the PNP complements of 2N3904 and
2N4401, respectively; those are probably the cheapest
general-purpose BJTs you're likely to find. I have a
general preference for the 4401 over the 3904, but it
probably doesn't make a huge difference.
- Dave
It appears to me that 2N3906 silicon transistors
should work in place of
the 2G371 with only minor changes to the circuits. However, you should
test individual circuits before you build the whole computer and
discover that it doesn't work.
I was thinking 2N2222's. I took a quick look and nothing seems to need ge
transistors.
I still have to check what is PNP or NPN's so 2N2222's may not work.